Ok....
We have tried deleting the map and map related files and still no luck.
You definetly have a corrupt file somewhere in your UT folder...The screenshot of error just does not give enough information to know exactly which file.
Can you backup your system folder and then patch UT again. The performance might suck, but I want you to, once patched to see if the map works. it is going to be a painful step by step file eliminiation now :/
You are the first person we have ever encountered to have a problem with a map
It really sucks that you can't play the map, since it is one of the best siege maps.
I think the best thing to do, would be to have a new installation of UT in a new directory so that we can run debug on the patched version that sucks